Pl it's an emergecy and pl show step by step

Asoccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?